<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 导入依赖 -->
    <script src="https://lib.baomitu.com/leaflet/1.9.2/leaflet.js"></script>
    <link rel="stylesheet" href="https://lib.baomitu.com/leaflet/1.9.2/leaflet.css">
    <style>
        * {
            margin: 0;
            padding: 0
        }

        #map {
            width: 100vw;
            height: 100vh;
        }
    </style>
</head>

<body>
    <div id="map">

    </div>
    <script>
        /* 瓦片图层 */
        var url = 'https://api.mapbox.com/styles/v1/mapbox/streets-v11/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoiY2hlbmdiZW5jaGFvIiwiYSI6ImNsODU3aGRiODA0Y2UzcHBzZmFlcmdqZ2sifQ.8k59W_pB_Riwe6o-MneRlA'
        var layer = L.tileLayer(url, {
            maxZoom: 19,
            attribution: '© OpenStreetMap'
        })
        /* 实例化地图 */
        const map = L.map("map", {
            layers: [layer],
            /* center:[纬度,经度] */
            center: [30.50, 114.30],
            zoom: 4
        })
        // 声明geojson数据
        var data = {
            type: "Feature",
            geometry: {
                type: "Polygon",
                coordinates: [ // 区坐标：三维数组
                    [
                        [114, 30],
                        [120, 30],
                        [120, 24]
                    ]
                ]
            }
        }
        // 加载geojson数据【L.geoJSON()】
        var polygon_layer = L.geoJSON(data);
        // 生成一个图层【这个图层类似一个图层管理器，具有clearLayers()方法，（图层管理器也是一个图层）】
        map.addLayer(polygon_layer);


    </script>
</body>

</html>